Metso D202275 | ACN MR Controller, Industrial DCS Spare

Description

Key Technical Specifications

The most consistent identification in available records is D202275 = METSO ACN MR Controller. The controller is commonly supplied as an assembly with D201832L IPSP and D202214 base.

A caution on specifications: some secondary listings claim 5 × 100 Mbit/s Ethernet, +24 VDC input, 5 ms control cycle, Linux, PROFIBUS/PROFINET/EtherNet/IP support, and 0–70 °C operation. Those figures are not sufficiently supported by primary Metso/Valmet documentation found for this exact part number, so they should be treated as unverified configuration claims, not purchasing specifications.

Product Introduction

Metso D202275

The Metso D202275 is an ACN MR process controller used in Metso’s legacy distributed control architecture. Available equipment records explicitly identify D202275 as the ACN MR controller and associate it with the D201832L IPSP and D202214 base.

For brownfield DCS maintenance, D202275 should be treated as a system-level controller rather than an isolated plug-in PLC CPU. The controller, power/processor module, base, firmware, application configuration, and communication architecture must be considered together when replacing a failed unit.

D202275

Application Scenarios & Field Pitfalls

Engineering Pain Point

A failed DCS controller rarely means the controller itself is the only problem. On an older ACN MR installation, loss of communication can originate from the controller, IPSP, base, network connection, configuration, or power distribution. Swapping without checking the associated D201832L and D202214 assembly can waste a shutdown window.

Typical Applications

• Pulp and Paper — Process control for pulp preparation, paper machines, stock handling, drying, and auxiliary systems.
• Mining and Minerals — Distributed control for grinding, flotation, conveying, pumping, and material-processing systems.
• Energy and Utilities — Process and equipment control in legacy industrial power-generation installations.
• Process Industries — Central control of pumps, valves, motors, temperature loops, pressure loops, and other continuous-process equipment.

Technical Pitfalls to Avoid

1. Do not confuse with D202214.
   This distinction is especially important given the previous part number. is identified as the ACN MR controller; D202214 is the associated base.
2. Check the complete controller assembly.
   The documented combination is + D201832L IPSP + base. If the controller does not start, check the IPSP and base before declaring the defective.
3. Do not assume every has the same network configuration.
   Communication interfaces and system topology can depend on the particular ACN MR installation. Verify the cabinet drawings and network architecture before changing connections.
4. Preserve the application configuration.
   A replacement CPU/controller is not necessarily a plug-and-play replacement from a control-logic perspective. Back up the existing application and document controller identity, node address, network parameters, and system configuration before removal.
5. Verify hardware revision.
   Legacy Metso hardware can have revision differences that are not obvious from the basic designation. Compare the complete nameplate and board markings.
6. Check power before replacing the controller.
   The associated D201832L IPSP is specifically identified as part of the controller assembly. A controller that appears dead may have a power-distribution problem rather than a processor failure.
7. Do not trust generic specifications from reseller listings.
   Public sources disagree about detailed voltage, Ethernet, operating-system, and fieldbus specifications. For engineering replacement, the original Metso/Valmet project documentation takes precedence.
8. Check the base connector condition.
   The base forms part of the physical/electrical controller assembly. Inspect connectors for contamination, oxidation, mechanical damage, and poor contact before commissioning a replacement.
9. Test redundancy at the system level.
   If the ACN MR installation uses controller redundancy, do not stop after confirming that the replacement controller boots. Verify controller synchronization, network paths, switchover behavior, alarms, and process-control continuity.

Related Products

• — IPSP module associated with the controller. It forms part of the controller assembly and should be checked whenever has a startup or power-related failure.
• — Base assembly for the ACN MR controller. It provides the physical and electrical interface for the controller assembly. It is not the controller CPU itself.
• Metso D201463 — ACN MR controller hardware from the same general legacy Metso automation family. It is a related controller rather than an automatic substitute.
• Metso D201505 / D201505R — Related ACN MR controller hardware. Useful when identifying older Metso controller architectures, but compatibility must be established from the actual system documentation.
• Metso D201380 — Legacy ACN MR controller module. It belongs to the same broader controller family but should not be substituted for based solely on physical similarity.
• Metso D201139 — Another ACN MR controller designation encountered in legacy Metso systems. Functional and hardware compatibility must be verified before substitution.
• Metso D201832 — Related IPSP/power-supply hardware. The variant is specifically documented with .
• Metso PDP403 — Distributed processing unit from the legacy Metso automation family. It serves a different controller architecture and is not a direct replacement.
• Metso D201925 — Legacy Metso controller hardware encountered in older DCS installations. It is relevant for migration and spare-parts identification but is not a drop-in replacement for .
• Metso + + — The most important related assembly to verify when sourcing this controller. Multiple records identify these three components together as the ACN MR controller assembly.